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Simplifying 7n + -1(3n + 18) = 0 Reorder the terms: 7n + -1(18 + 3n) = 0 7n + (18 * -1 + 3n * -1) = 0 7n + (-18 + -3n) = 0 Reorder the terms: -18 + 7n + -3n = 0 Combine like terms: 7n + -3n = 4n -18 + 4n = 0 Solving -18 + 4n = 0 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + 4n = 0 + 18 Combine like terms: -18 + 18 = 0 0 + 4n = 0 + 18 4n = 0 + 18 Combine like terms: 0 + 18 = 18 4n = 18 Divide each side by '4'. n = 4.5 Simplifying n = 4.5
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